Home / 20,153.81-27,812.30-11,203.44

Finding the Fourth Proportional to 20,153.81, 27,812.30 and 11,203.44

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Solution

The fourth proportional to 20,153.81, 27,812.30 and 11,203.44 is: 15,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.81 : 27,812.30 = 11,203.44 : x
  2. Step 2: Convert to fraction form
    20,153.81/27,812.30 = 11,203.44/x
  3. Step 3: Cross multiply
    20,153.81x = 27,812.30 × 11,203.44
  4. Step 4: Simplify right side
    20,153.81x = 311,593,399.49
  5. Step 5: Solve for x
    x = 311,593,399.49/20,153.81
  6. Step 6: Final answer
    x = 15,460.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.